What city is the capital of the United Republic of Nations in The Legend of Korra?

Republic City is the capital of the United Republic of Nations in The Legend of Korra. It is the series’ main setting and the political, commercial, and cultural center of the modern Avatar world.

The city was founded after the Hundred Year War by Avatar Aang and Fire Lord Zuko as a place where people from the former nations could live together. Rather than belonging to one element or nation, it became a multinational territory. That history explains both its diverse population and the tensions that repeatedly threaten it.

Republic City combines traditional bending culture with early twentieth-century-inspired technology, including electricity, radios, automobiles, factories, and pro-bending arenas. It is sometimes confused with Ba Sing Se, Omashu, or Zaofu, but those are major cities associated with the Earth Kingdom. Republic City is a separate political entity and serves as the capital of the United Republic of Nations.